In the Project window, groups organize files into collapsible lists. Click a group's name to expand it and view its contents. Click the group's name again to collapse it and view only its name.

You can expand or collapse all subgroups that belong to a particular group, as shown in Figure 3.10. Use one of the following techniques:

Alt-click the group's name.

Option-click the group's name.

You can also expand or collapse sibling groups (all groups at the same level), as shown in Figure 3.11. Use one of the following techniques:

Ctrl-click a group's name.

Command-click a group's name.